Alert archive / Indiana / Mesoscale Discussions in 2016

Mesoscale Discussion 1582

August 24, 20167 counties in Illinois; 43 counties in Indiana; 4 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Aug 24, 2016, 3:43 PM CDT for 7 counties in Illinois; 43 counties in Indiana; 4 counties in Ohio. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Aug 24, 2016, 3:43 PM CDT (20:43 UTC)
Expired: Aug 24, 2016, 5:15 PM CDT
In force: 92 min
Issued by: the Storm Prediction Center

All 54 counties

Clark County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Jasper County, IL, Bartholomew County, IN, Boone County, IN, Brown County, IN, Clay County, IN, Clinton County, IN, Daviess County, IN, Dearborn County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Fountain County, IN, Franklin County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Jackson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Vermillion County, IN, Vigo County, IN, Wayne County, IN, Butler County, OH, Darke County, OH, Montgomery County, OH, Preble County, OH

The radar

The Indianapolis radar (KIND), 18 km from the middle of the area, began a volume at 20:44 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.7 hours before the alert went out and 185 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 550 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 741 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 255 m²/s²
0-3 km storm-relative helicity: 267 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 24, 1:20 PM CDT	Mesoscale Discussion	SPC	Champaign, Clark, Coles, Crawford, Cumberland, DeWitt and 10 more	85 min
Aug 24, 2:10 PM CDT	Tornado Watch	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 36 more	8 hr
Aug 24, 5:03 PM CDT	Mesoscale Discussion	SPC	Dearborn, Franklin, Union	57 min
Aug 24, 5:15 PM CDT	Mesoscale Discussion	SPC	Allen, Auglaize, Crawford, Defiance, Erie, Fulton and 17 more	60 min
Aug 24, 5:51 PM CDT	Tornado Watch	SPC	Hancock, Lucas, Ottawa, Sandusky, Seneca, Wood and 1 more	4 hr

Nearby

Mesoscale Discussions in Indiana, 2016 Mesoscale Discussions in Illinois, 2016 Mesoscale Discussions in Ohio, 2016 Every mesoscale discussion in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.